Machine for turning off crank-pins and like parts.



- J. BJEDWARDS.

MACHINE FOR TURNING oFF cRANKP'xNs AND LINE PARTS.

APPLICATIGN FILED MAR. I3. l9l4. RENEWED FEB. 2.1917.

Patented Sept. 4, 1917.

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JAMES B. EDW'ARDS,

OF COLUMBIA, SOUTH CAROLINA, ASSIGNOR OF ONE-HALF TO GIBBES MACHINERYCGMPANY, OF COLUMBIA, SOUTH CAROLINA.

MACHINE EOR TURNING OFF CRANK-PINS ANI) LIKE PARTS.

Application med/March 13, 1914, Serial No. 824,542. Renewed. February Toall whom t may concern:

Be it known thatI, JAMES B. Enwanns, a citizen of the United States,residing at Columbia, in the county of Richland and State of SouthCarolina, have invented new and useful Improvements in Machines forTurning Off Crank-Pins and like Parts, of which the following is aspecification.

An object of the invention is to provide a machine for quickly turningoff and truing up crank pins, and like parts.

The invention contemplates among other features, the provision of amachine of a simple character for use in truing up they bearing surfacesof crank pins and the like. To this end a machine is designed toaccurately perform the work and the machine is so constructed andarranged that it can be operated by workmen or laborers who need not beespecially skilled in machinery, to operate the machine.

In the further disclosure of the invention reference is to be had to theaccompanying drawings, constitutinga part of this specication, in whichsimilar characters of reference denote corresponding parts in all theviews, and in which Figure 1 is a fragmentary vertical sectional view ofmy device.

Fig. 2 is a vertical transverse sectional view taken on the line 5-5 inFig. 1.

Fig. 3 is a perspective view of the work holding member.

Referring more particularly to the views, I provide a base 10 carryingan upright 11 terminating in a bearing 12, through which passes a toolbar 13 the forward end of which is formed with an enlarged headconstituting a socket 14. The socket 14 is adapted to receive a bushing15 into which one end of a crank pin 16 is threaded or otherwise fitted,it being thus apparent that the socket 14 can accommodate bushingshaving different interior diameters and whereby crank pins of dierentsizes can be used in connection with the machine. Supported on thebushings and encircling the same is a boxing 17, the inner end of theboxingbeing provided with a shoulder 18 which is adapted to engage theenlarged head of the tool bar and lock the same thereupon. Encirclingthe tool bar is a sleeve 19, the forward end-of the sleeve being carriedby the boxing 17 while the rear end thereof is provided with a toothedwheel Specification of Letters Patent.

Fatented Sept. 4, 191'?.

e, i917. serial No. 146,263.

20. The toothed wheel 20 meshes withv a smaller toothed wheel 21 carriedon a ysuitable spindle 22, the saidspindle being journaled on theupright and having one end tapered as at 23 to receive a suitable handlewhereby, when rotation is imparted to the spindle, they toothed wheel 21will be rotated, thus imparting rotation to the toothed wheel 20 and inthat manner resulting in rotation of the sleeve 19, the boxing 17 andalso the bushing 15 so that rotation will be imparted to the tool bar 13and to the work 16.

Mounted in the upper portion of the boxing 15 is one end of the tool bar24, the boxing being provided with an auxiliary key 25 operating in thekeyway 26, whereby the tool bar will be locked within the boxing androtation of the same prevented. It will be noted that the tool bar 24extends to and beyond the boxing, the outer extremity of the bar beingprovided with a tool 27. The inner end of the tool bar is providedwith alongitudinally extending bar, the bar being threaded to receive a screw28, the screw being rotatably mounted within the toothed wheel 2O andbeing provided with a star wheel 29. In order to hold the .bar 13against rotation a screw 30 passes through the upright 11 and engagesthe work holding bar, thus holding the same against movement relative tothe upright.

It is to be understood that the screw 28 being Carried by the toothedwheel 20, that upon rotation. of the latter and by means of the smalltoothed wheel 21, the tool bar and tool will be rotated about the work16. The spindle 22 carries a pin 31 which, when the toothed `wheel 2O isrotated, will be engaged by the projections of the star wheel 29 at eachrevolution of the toothed wheel, thus turning the star wheel to actuatethe screw 28 whereby the tool bar will be advanced to advance the tool27 over the periphery of the crank pin or work 16.

In practice, when rotation is imparted to the toothed wheel 21, thelarger toothed wheel 20 will be rotated, thus turning the tool bar andstar wheel together with the boxing around the member 13, and that ateach revolution of the toothed wheel the star wheel engaged by the pin31 will cause the tool bar to be advanced in the boxing, thus advancingthe tool 27 over the exterior surface to be trued up.

The machine described is of a simple construction, can be readilyoperated and although I have shown a spindle 22 as adapted to receive ahandle and he manually rotated, it Will be understood that the same canbe also operated by a suitable driving mechanism or other machinery suchas electric motor or the like.

Having thus described my invention, I

claim:

A machine for turning up Work comprising a base, a spindle mounted insaid base, a tooth Wheel rigidly mounted on said spindle, an uprightformed on said base, a bearing formed in the upper extremity of saidupright and extending transversely thereof, a Work engaging memberextending through said bearing, a boxing surrounding one end of saidWork engaging member, a sleeve surrounding said Work engaging memberCopies of ture in presence of two Witnesses.

JAMES B. EDVARDS.

Witnesses:

D. L. SHERRILL, K. W. PARHAN.

this patent may be obtained for ve cents each, by addressing theCommissioner of Patents,

Washington, D. C.

